How to fix listening to Voicemail messages in VUP/VUC

When listening to voice messages does not work in VUP or VUC.

Try to setup following keys in AppSettings.config :

 
<add key="VoipBox_DestinationFolder" value="C:\mp3files\"/> <!-- Set to voibox storage when voicemail store in mp3 -->
<add key="TempDir" value="C:\temp" />

Both directories should have full access for IIS_IUSRS user to write and read from c:\temp and c:\mp3files directories.
Also check if VoipBox_ListenerIP and VoipBox_ListenerPort keys are set correctly.